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COMM (1)

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comm - select or reject lines common to two sorted files

CONTENTS

Synopsis
Description
Environment Variables
See Also

comm [-123] file1 file2

Comm reads file1 and file2, which should be ordered in the current collating sequence, and produces a three column output: lines only in file1; lines only in file2; and lines in both files. The filename '-' means the standard input.

Flags 1, 2, or 3 suppress printing of the corresponding column. Thus comm -12 prints only the lines common to the two files; comm -23 prints only lines in the first file but not in the second; comm -123 is a no-op.

LANG, LC_ALL
	See locale(7).
LC_COLLATE
	Sets the collation sequence.
LC_CTYPE
	Determines the mapping of bytes to characters.

cmp(1), diff(1), uniq(1), locale(7)